Refactor cc scrollbar layers to separate solid-color vs desktop.

content/browser/renderer_host/render_process_host_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Represents the browser side of the browser <--> renderer communication
 // channel. There will be one RenderProcessHost per renderer process.
 
 #include "content/browser/renderer_host/render_process_host_impl.h"
 
 #include <algorithm>
@@ skipping 915 matching lines @@
     switches::kDisableLegacyEncryptedMedia,
     switches::kOverrideEncryptedMediaCanPlayType,
     switches::kEnableExperimentalWebPlatformFeatures,
     switches::kEnableFixedLayout,
     switches::kEnableDeferredImageDecoding,
     switches::kEnableGPUServiceLogging,
     switches::kEnableGPUClientLogging,
     switches::kEnableGpuClientTracing,
     switches::kEnableGpuBenchmarking,
     switches::kEnableMemoryBenchmarking,
-    switches::kEnableOverlayScrollbars,
     switches::kEnableSkiaBenchmarking,
     switches::kEnableLogging,
     switches::kEnableSpeechSynthesis,
     switches::kEnableTouchDragDrop,
     switches::kEnableTouchEditing,
 #if defined(ENABLE_WEBRTC)
     switches::kEnableWebRtcAecRecordings,
     switches::kEnableWebRtcTcpServerSocket,
     switches::kEnableWebRtcHWDecoding,
 #endif
@@ skipping 89 matching lines @@
     switches::kDisableDeviceMotion,
 #endif
     // Please keep these in alphabetical order. Compositor switches here should
     // also be added to chrome/browser/chromeos/login/chrome_restart_request.cc.
     cc::switches::kBackgroundColorInsteadOfCheckerboard,
     cc::switches::kCompositeToMailbox,
     cc::switches::kDisableCompositedAntialiasing,
     cc::switches::kDisableImplSidePainting,
     cc::switches::kDisableThreadedAnimation,
     cc::switches::kEnableImplSidePainting,
+    cc::switches::kEnableOverlayScrollbars,
     cc::switches::kEnablePartialSwap,
     cc::switches::kEnablePerTilePainting,
     cc::switches::kEnablePinchVirtualViewport,
     cc::switches::kEnableTopControlsPositionCalculation,
     cc::switches::kForceDirectLayerDrawing,
     cc::switches::kLowResolutionContentsScaleFactor,
     cc::switches::kMaxTilesForInterestArea,
     cc::switches::kMaxUnusedResourceMemoryUsagePercentage,
     cc::switches::kNumRasterThreads,
     cc::switches::kShowCompositedLayerBorders,
@@ skipping 750 matching lines @@
     // Skip widgets in other processes.
     if (widgets[i]->GetProcess()->GetID() != GetID())
       continue;
 
     RenderViewHost* rvh = RenderViewHost::From(widgets[i]);
     rvh->UpdateWebkitPreferences(rvh->GetWebkitPreferences());
   }
 }
 
 }  // namespace content